The heart and Circulation Flashcards
1
Q
What kind of circulatory system does the heart have? Advantages?
A
- Double.
- Blood travels through the heart twice:
- Travels rapidly to the body cells + delivering the oxygen the body needs.
2
Q
What is the heart + What is it’s function?
A
- Organ.
- Consists of many muscle tissues.
- Function:
- Pump blood all around the body.
3
Q
Structure 1 of the heart: 4 Chambers.
A
- Top= Left Atrium + Right Atrium.
- Bottom= Left Ventricle + Right Ventricle.
- ## Atria are separated from the ventricles by valves.
4
Q
Feature 1 of the heart Vena Cava (Left Passage).
A
- Brings deoxygenated blood from the lower body to the heart.
5
Q
What does the pulmonary artery do?
A
- Blood passes from the heart to the lungs in the pulmonary artery.
6
Q
What does the pulmonary veins do?
A
- Oxygenated blood passes from the lungs to the heart in the pulmonary vein.
7
Q
What does the aorta do? (next to pulmonary artery).
A
- Oxygenated blood is pumped from the heart to the body in the aorta.
8
Q
Pattern of blood flow from the heart;
A
1) Blood enters the left and right atrium.
2) Atria contracts and blood is forced into the ventricles.
3) Ventricles contract and blood is forced out of the heart.
4)
9
Q
What is the purpose of the valves?
A
- Stops blood from flowing backwards into the atria when the ventricles contract.
10
Q
Why does left side of heart has a thicker muscular wall than right?
A
- Left Ventricle pumps blood around the entire body.
- ## So needs to provide a greater force.
11
Q
What is the coronary artery?
A
- Branch out of the aorta.
- Spread out into heart muscle.
- Purpose: provide oxygen to the muscle cells of the heart.
- Oxygen is used in respiration for muscle contractions.
12
Q
What is a pace maker?
A
- Peacemakers control the natural resting heart rate.
- ## Found in right atrium.
13
Q
What happens if a persons pace maker stops working correctly?
A
- Doctors can implant an artificial pacemaker.
- Small electrical device.
- Corrects inregularities in the heart rate.
